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Select incorrect trend for extent of hydrolysis :

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${SF}_{4} > {SF}_{6}$

${NCl}_{3} > {NF}_{3}$

${PF}_{3} > {PCl}_{3}$

${SeF}_{6} > {SF}_{6}$

answer is C.

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Detailed Solution

The proper trend is ${PF}_{3} > {PCl}_{3}$ , hence ${PF}_{3} > {PCl}_{3}$ is erroneous. ${PF}_{3}$ is more quickly hydrolyzed than ${PCl}_{3}$ because it is less stable and has a weaker $P - F$ bond.

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